WASHINGTON — US authorities are warning air travelers to expect greater scrutiny of thermoses and other insulated drink containers at security checkpoints after intelligence suggested they could be used to hide explosives.

There is “no information related to any specific or imminent threat,” Ann Davis, a spokeswoman for the Transportation Security Administration, told Reuters yesterday.

A notice on the TSA’s Web site warned that explosives might be hidden in beverage containers and said the warning was “based on intelligence.”

It said TSA “is carefully monitoring information related to terrorist tactics and working with our international partners to share information and security best practices.”

As a result, passengers flying within and to the United States may notice additional security measures related to insulated beverage containers in coming days, the notice posted on Thursday said.